Phewnil, O.-A., Tungkananurak, N., Panichsakpatana, S. and Pitiyont, B. 2016. Phytotoxicity of Atrazine Herbicide to Fresh Water Macrophyte Duckweed (Lemna perpusilla Torr.) in Thailand. Environment and Natural Resources Journal. 10, 1 (Nov. 2016), 16–27.